@misc{indiciae89aeb040fa4e,
  title = {Development of a spatial analysis method using ground-based repeat photography to detect changes in the alpine treeline ecotone, Glacier National Park, Montana, U.S.A.},
  author = {W. Roush and Jeffrey S. Munroe and D.B. Fagre},
  year = {2007},
  doi = {10.1657/1523-0430(2007)39[297:doasam]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70029799},
  note = {Source identifier: 70029799}
}